3. She Gets Along With Your Friends And Family

A great girlfriend will make an effort to get to know your people. She'll help your parents out at Thanksgiving, try to understand your brother's twisted sense of humor and want to get to know your friends.

She'll actually empathize with your sister's getting dumped and suggest that you guys take her out to cheer her up. Not only that, but your friends won't roll their eyes and moan when you mention that she'll be joining you guys when she gets off work — she's one of the crowd.